121222121220200 has 192 divisors, whose sum is σ = 378416468545920. Its totient is φ = 34877093760000.

The previous prime is 121222121220169. The next prime is 121222121220257. The reversal of 121222121220200 is 2022121222121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 302552351 + ... + 302952750.

It is an arithmetic number, because the mean of its divisors is an integer number (1970919107010).

Almost surely, 2^{121222121220200} is an apocalyptic number.

121222121220200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222121220200 is an abundant number, since it is smaller than the sum of its proper divisors (257194347325720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121222121220200 is a wasteful number, since it uses less digits than its factorization.

121222121220200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605505148 (or 605505139 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121222121220200 its reverse (2022121222121), we get a palindrome (123244242442321).

The spelling of 121222121220200 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred".